表格的练习做业
<!DOCTYPE html>
<html>
<head>
<title>表格</title>
<style type="text/css">
table{ border: 1px solid #ccc; border-collapse: collapse;}
tr th{height:20px;border:1px solid #ccc;width:100px;}
tr td{height:20px;border:1px solid #ccc;width:100px;}
</style>
</head>
<body>
<table>
<tr><th colspan="5">做业</th></tr>
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
<td>5</td>
</tr>
<tr>
<td>6</td>
<td>7</td>
<td>8</td>
<td>9</td>
<td>0</td>
</tr>
</body>
</html>